In this article we will discuss about Scoliodon:- 1. Introduction to Scoliodon 2. Habit and Habitat of Scoliodon 3. Geographical Distribution 4. External Structures 5. Skin 6. Muscular System 7. Skeletal Structures 8. Locomotion 9. Coelom 10. Digestive System 11. Respiratory System 12. Circulatory System 13. Arterial System 14. Venous System 15. Nervous System 16. Urinogenital System 17. Development. Contents: [...]
In this article we will discuss about the classification of fishes. Class (1) Pterichthyes (Devonian) (Antiarchi): The members of this class lived in the Devonian period. They are fresh water forms and the fossils that are well-preserved reveal certain internal structures. (i) The head and the thoracic regions are provided with strong bony plates. (ii) The arrangement of the bony [...]
In this article we will discuss about Dipnoi:- 1. Introduction to Dipnoi 2. Geographical Distribution of Dipnoi 3. Palaeozoic Records 4. Habit and Habitat 5. External Structures 6. Skeletal Structures 7. Digestive System 8. Respiratory System 9. Circulatory System 10. Nervous System 11. Endocrine System 12. Excretory System 13. Reproductive System 14. Affinities 15. Cytogenetic Evidence. Contents: Introduction to Dipnoi [...]